<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<script type="text/javascript">
    var  aa=100;
    var  bb=" 啦啦啦啦";
    console.log(typeof  aa);
    console.log(typeof bb);
</script>
</body>
</html>